1. 含并列连词and but or的平行结构
解题要点 当上述并列连词连接两项或多项对等成分时，这些成分必须同词性、同形式。特别注意出现三项以上(含三项)的并列成分，多是考试焦点。
全真例题分析
(1) Quartz may be transparency, translucent, or opaque, and it may be colorless or colored (91.5)
[答案] A 并列连词or连接三项，其中两项为形容词translucent与opaque，故(A)应用形容词transparent与之并列。
(2) At the age of 94. Composer, conductor. Arranger. And acting Eva Jessye led her choral group in the first production of the opera porgy and Bess, written in 1935. (92.1)
[答案] A 并列连词and连接四项表示身份职业的名词，故(A)动名词应改为actress。
(3) Atrophy is a decrease in size of a cell, organ, tissues, or other part of the body such as (91.10)
[答案] C 并列连词or连接四项名词结构，其中cell 和organ皆为单数形式，故(C)亦应改为单数tissue。
(4) Direct mail advertising serves to acquaint customers with Products, alert them to new opportunities, and paving the way for other sales activities (93.1)
[答案] C 并列连词and连接三项动宾结构，前两项均为动词原形，故(C)动名词亦应改为原形动词pave.
(5) A majority of the reports received from people claiming to have seen the lengendaiy Loch Ness monster have proven to be mistakes, misconceptions, or they were being tricked. (93.10)
[答案] D 并列连词or连接三项成分。前两项均为名词，故(D)不应出现句子结构，而应改为名词tricks与前面的mistakes和misconceptions平行。
(6) The tongue is capable of many motions and configurations and plays vital rode in chewing, swallowed and speaking.
[答案] D 并列连词and连接三个单词。其中两项均为动名词，故(D)亦应改为动名词swallowing。
2. 比较级句型要求对比双方结构对等，比较范围相当。
全真列题分析
(1) Probably no man had more effcet on the daily lives of most people in the United States ------- Henry Ford. A pioneer in automobile production.
(A) as was
(B) than was
(C) than did
(D) as did (92.8)
[答案] C 比较句型 more…than 要求比较的双方结构相等。前项是实义动词的过去时形式had，故选(C)than did与之平行。
(2) The state of Maine generally has cooler temperatures than -------
(A) there are most other states
(B) most other states which have
(C) most other states have
(D) having most other states (93.10)
[答案] C 这是标准的more…than比较句型。只有(C)的句子结构与相对比的前一项完全一致。
(3) The annual worth of Utah*s manufacturing is greater than-------
(A) that of its mining and farming combined
(B) mining and farming combination
(C) that mining and farming combined
(D) of its combination mining and farming (91.8)
[答案] A 此句比较的是utah的年产值(the annual worth) (A)中that即代替了the annual worth，故前后比较的范围，内容一致。
(4) The activities of the international marketing researcher are frequently much broader than-------
(A) the domestic marketer has
(B) the domestic marketer does
(C) those of the domestic marketer
(D) that which has the domestic marketer (91.5)
[答案] C 此句比较的是国际市场研究者与国内市场研究者的活动(the activities) 为避免同词重复，用(C)those来代替前面的名词the activities ,因而对比双方比较的范围是平行相等的。
(5) Fructose is a monosaccharide sugar that is much sweeter -------
(A) than cane sugar does
(B) does cane sugar
(C) cane sugar
(D) than cane sugar (90.5)
[答案] D 此比较句型前半部分主系表结构，后半部不可出现助动词does(答案A及B)，但可省略系词，如(D)。
3. 比较句型 the +比较级…the+比较级要求前后结构相等。
全真例题分析
(1) The flatter a hair appears under a microscope ------- wavier it is.
(A) although
(B) which
(C) and
(D) the (92.1)
[答案] D The flatter a hair appears 与(D)the wavier it is 是完全对等的结构。
比较级 主语 谓语动词 比较级 主语 系动词
(2) The less the surface of the ground yields to the weight of the body of a runner, ------- to the body.
(A) the stress it is greater
(B) greater is the stress
(C) greater stress is
(D) the greater the stress (90.1)
[答案] D The less the surface 与答案(D) the greater the stress 是完全对等的结构。
4. 语意上的平行结构
解题要点 有一些词和短语表达比较的概念，尽管不是比较级句型，但同样要求前后对比双方同形式，同性质。
全真例题分析
(1) Alexander Graham Bell once told his family that he would rather of the deaf ------- of the telephone.
(A) than inventing
(B) than as the inventor
(C) the invention
(D) as the inventor (90.8)
[答案] B 表示比较概念的短语would rather …than应使用平行结构。
(2) Thomas Jefferson*s achievements as an architect rival his contributions ------- a politician.
(A) such
(B) more
(C) as
(D) than (90.1)
[答案] C 动词rival (比得上)要求比较二项结构相等。
(3) California*s agricultural supremacy dates from 1947. When its farm output first ------- any other state.
(A) that exceeded
(B) exceeded that
(C) exceeded that of
(D) that exceeded of (92.10)
[答案] C 动词exceeded (超过)要求比较的内容相当。(C)代词that用以指代比较的内容“farm output”
(4) It is common lcnowledge that a flash of lightning is seen before a clap of thunder heard . (93.5)
[答案] D 连词 be fore用以引出先后发生的两个动作。从句意上看。这两个动作是对比关系，故应用平行结构。(D)改为a clap of thunder is heard ,与a flash of lightning is seen 相平衡。
